This is one Lot (Qty. 5) of New Mini-Circuits Low Noise Enhancement Mode pHEMT, Part Number: SAV-541+ in SOT-343(SC-70) Package. RoHS Compliant. This part is recommended by Mini-Circuits to replace discontinued Avago/Agilent Technologies ATF-54143. I also have few PCB designed for this transistor, see below eBay link. You can also found RF housing under Develop Kit in my store.

Many links and documents below associated with ATF-54143 can be applied to SAV-541+.

http://www.ebay.com/itm/Develop-PCB-Agilent-Avago-pHEMT-LNA-ATF-5X143-2pcs-/400822303585?

http://www.ebay.com/itm/Develop-PCB-Agilent-Avago-2-Stage-ATF-5X143-2pcs-/150203720254?pt=LH_DefaultDomain_0&hash=item22f8d6e23e#ht_674wt_1185

http://www.ebay.com/itm/Develop-PCB-Agilent-Avago-ATF-5X143-SOT-86-MMIC-2pcs-/150203721161?pt=LH_DefaultDomain_0&hash=item22f8d6e5c9#ht_694wt_1185

General Specifications:

Detail Spec and App Note on Web as follows:

Data Sheet and all other useful application note and example circuits and components values can be found at Avago website below:

http://www.avagotech.com/pages/en/rf_ics_discretes/transistors/gaas_field_effect/atf-54143/

Example of Application Note AN-5057 for designing 100-500MHz LNA:

http://www.rfbayinc.com/upload/files/atf-54143_100-500mhz_lna.pdf
 
You can also find Other Application Note in Avago Website:
 
AN-5057: 100-500MHz LNA
AN-1229: 900MHz LNA
AN-1222: 1850-1910MHz LNA
AN-1286: 5.0-5.8GHz LNA
AN-5331: 3.0-3.8GHz LNA

I also use this ATF-54143 designed following amplifier (you can search model number on eBay to find out data sheet) used above mentioned one-stage PCB:
LNA-300
LNA-400
LNA-550
LNA-580
LNA-600
LNA-1400
LNA-1520
LNA-3000A and LNA-3000B

And ATF-54143 with 2-Stage PCB model:
LNA-605
LNA-1035
LNA-1835
LNA-5200
LNA-5500
LNA-5800
LNA-6500

And ATF-54143 with another MMIC use ATF-5X143+SOT-86/SOT-89 PCB:
LNA-4020
LNA-4050